.airport-list-container {
    background: #F5F5F5;
    .letter-container {
      position: fixed;
      top: 128px;
      right: 20px;
      width: 44px;
      z-index: 1;
      .letter-item {
        height: 40px;
        line-height: 40px;
        color: #999;
        text-align: center;
        font-size: 24px;
      }
    }
  }